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Mr Zaryn, quoted by Radio Poland, said the ABW had information that Russia was “not only inspiring Polish citizens to take specific actions against Poland and in the interests of Russia, but also financing their activities”.

He did not give details of the alleged networks’ activities. He said they were engaged in “fuelling Polish-Ukrainian animosity in the social and political sphere and undermining the interpretation of Polish history, replacing it with a Russian narrative”.

Western governments accuse Russia of spreading fake news about the Ukraine conflict and other sensitive issues, in order to weaken public support for EU and Nato policies.